linux-kernel - Re: [PATCH net-next] modules: allow modprobe load regular elf binaries

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Message-ID: <74e26cc0-9e72-f03b-5396-f3480921f234@fb.com>
Date:   Fri, 9 Mar 2018 10:50:49 -0800
From:   Alexei Starovoitov <ast@...com>
To:     Andy Lutomirski <luto@...capital.net>,
        Greg KH <gregkh@...uxfoundation.org>
CC:     Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Djalal Harouni <tixxdz@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-team <kernel-team@...com>,
        Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH net-next] modules: allow modprobe load regular elf
 binaries

On 3/9/18 10:23 AM, Andy Lutomirski wrote:
>
>
>> On Mar 9, 2018, at 10:15 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
>>
>
>>
>> Oh, and for the record, I like Andy's proposal as well as dumping this
>> into a kernel module "blob" with the exception that this now would take
>> up unswapable memory, which isn't the nicest and is one big reason we
>> removed the in-kernel-memory firmware blobs many years ago.
>>
>
> It might not be totally crazy to back it by tmpfs.

interesting. how do you propose to do it?
Something like:
- create /umh_module_tempxxx dir
- mount tmpfs there
- copy elf into it and exec it?